Re[2]: Job coverage for contaminated filters

[BRZGV@ccmail.ceco.com]

     What is the source of these filters?  Might they be high volume air 
     filters with sample volumes somewhere in the Mega-cfm range?  I am 
     interested in how this filter is used and what you credit as to the 
     source of the Be-7.


______________________________ Reply Separator _________________________________
Subject: Re: Job coverage for contaminated filters
Author:  radsafe@romulus.ehs.uiuc.edu at INTERNET
Date:    4/2/96 4:34 PM


I recall that someone at Los Alamos was having a similar Be-7 monitoring 
problem.  Might try them 
for the monitoring solution.  Be-7 is also a significant nuclide at SLAC.  I 
thought they were 
going to try to get relief from DoE for the limits for this nuclide.
     
I do not have any direct experience but would try a thin crystal NaI optimized 
for the .48 MeV 
photon.  But if you have a high background level it will be impossible.
     
As to the filters, I suggest you get the engineer who designed the installation 
to volunteer to 
demonstrate a safe changeout.  Maybe he will learn some practical engineering 
techniques.